FreeBSD/Linux Kernel Cross Reference
sys/contrib/zstd/lib/common/zstd_deps.h

     /*
      * Copyright (c) Facebook, Inc.
      * All rights reserved.
      *
      * This source code is licensed under both the BSD-style license (found in the
      * LICENSE file in the root directory of this source tree) and the GPLv2 (found
      * in the COPYING file in the root directory of this source tree).
      * You may select, at your option, one of the above-listed licenses.
      */
    
    /* This file provides common libc dependencies that zstd requires.
     * The purpose is to allow replacing this file with a custom implementation
     * to compile zstd without libc support.
     */
    
    /* Need:
     * NULL
     * INT_MAX
     * UINT_MAX
     * ZSTD_memcpy()
     * ZSTD_memset()
     * ZSTD_memmove()
     */
    #ifndef ZSTD_DEPS_COMMON
    #define ZSTD_DEPS_COMMON
    
    #include <limits.h>
    #include <stddef.h>
    #include <string.h>
    
    #if defined(__GNUC__) && __GNUC__ >= 4
    # define ZSTD_memcpy(d,s,l) __builtin_memcpy((d),(s),(l))
    # define ZSTD_memmove(d,s,l) __builtin_memmove((d),(s),(l))
    # define ZSTD_memset(p,v,l) __builtin_memset((p),(v),(l))
    #else
    # define ZSTD_memcpy(d,s,l) memcpy((d),(s),(l))
    # define ZSTD_memmove(d,s,l) memmove((d),(s),(l))
    # define ZSTD_memset(p,v,l) memset((p),(v),(l))
    #endif
    
    #endif /* ZSTD_DEPS_COMMON */
    
    /* Need:
     * ZSTD_malloc()
     * ZSTD_free()
     * ZSTD_calloc()
     */
    #ifdef ZSTD_DEPS_NEED_MALLOC
    #ifndef ZSTD_DEPS_MALLOC
    #define ZSTD_DEPS_MALLOC
    
    #include <stdlib.h>
    
    #define ZSTD_malloc(s) malloc(s)
    #define ZSTD_calloc(n,s) calloc((n), (s))
    #define ZSTD_free(p) free((p))
    
    #endif /* ZSTD_DEPS_MALLOC */
    #endif /* ZSTD_DEPS_NEED_MALLOC */
    
    /*
     * Provides 64-bit math support.
     * Need:
     * U64 ZSTD_div64(U64 dividend, U32 divisor)
     */
    #ifdef ZSTD_DEPS_NEED_MATH64
    #ifndef ZSTD_DEPS_MATH64
    #define ZSTD_DEPS_MATH64
    
    #define ZSTD_div64(dividend, divisor) ((dividend) / (divisor))
    
    #endif /* ZSTD_DEPS_MATH64 */
    #endif /* ZSTD_DEPS_NEED_MATH64 */
    
    /* Need:
     * assert()
     */
    #ifdef ZSTD_DEPS_NEED_ASSERT
    #ifndef ZSTD_DEPS_ASSERT
    #define ZSTD_DEPS_ASSERT
    
    #include <assert.h>
    
    #endif /* ZSTD_DEPS_ASSERT */
    #endif /* ZSTD_DEPS_NEED_ASSERT */
    
    /* Need:
     * ZSTD_DEBUG_PRINT()
     */
    #ifdef ZSTD_DEPS_NEED_IO
    #ifndef ZSTD_DEPS_IO
    #define ZSTD_DEPS_IO
    
    #include <stdio.h>
    #define ZSTD_DEBUG_PRINT(...) fprintf(stderr, __VA_ARGS__)
    
    #endif /* ZSTD_DEPS_IO */
    #endif /* ZSTD_DEPS_NEED_IO */
    
   /* Only requested when <stdint.h> is known to be present.
    * Need:
    * intptr_t
    */
   #ifdef ZSTD_DEPS_NEED_STDINT
   #ifndef ZSTD_DEPS_STDINT
   #define ZSTD_DEPS_STDINT
   
   #include <stdint.h>
   
   #endif /* ZSTD_DEPS_STDINT */
   #endif /* ZSTD_DEPS_NEED_STDINT */

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